A patient presents to the emergency department with a high fever, chills, chest pain worsened by deep breathing, and a cough producing rusty-colored sputum. Which of the following diagnostic tests is most likely to confirm the nurse's suspicion of pneumonia?
Pulmonary Function Test (PFT)
Electrocardiogram (ECG)
Complete Blood Count (CBC)
Chest X-ray
The Correct Answer is D
A. Pulmonary Function Test (PFT). PFTs assess lung function but do not provide diagnostic information for infections like pneumonia.
B. Electrocardiogram (ECG). An ECG assesses heart function and would not help in diagnosing a respiratory infection like pneumonia.
C. Complete Blood Count (CBC). A CBC may indicate infection through elevated white blood cells, but it does not confirm pneumonia or identify its location in the lungs.
D. Chest X-ray. A chest X-ray is the most useful diagnostic tool to confirm pneumonia. It can reveal infiltrates or consolidation in the lungs, which are characteristic of pneumonia.
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Correct Answer is ["A","C","D","E"]
Explanation
A. Ensure that the client's urine output is at least 1 ml/kg/hr. Adequate urine output is essential before administering IV potassium to ensure the kidneys are functioning properly and can handle the increased potassium load, preventing hyperkalemia.
B. Ensure potassium infusion is prepared with 5% dextrose solution. While IV potassium can be mixed with normal saline or dextrose solutions, the specific diluent will depend on the clinical scenario. This isn't necessarily a standard requirement, so it may not be appropriate for all situations.
C. Educate the client regarding high-potassium foods. Education on high-potassium foods helps the client maintain potassium levels after treatment, reducing the need for future supplementation.
D. Repeat blood serum potassium levels. Rechecking potassium levels ensures the patient reaches a safe and therapeutic range and helps monitor for signs of overcorrection or continued hypokalemia.
E. Cardiac monitoring during infusion. Cardiac monitoring is critical, as hypokalemia and potassium replacement can affect heart rhythm and lead to arrhythmias.
Correct Answer is B
Explanation
A. The glomerular filtration rate decreases because there is a reduction of blood flow to the kidneys. Reduced blood flow to the kidneys, or renal hypoperfusion, decreases the glomerular filtration rate (GFR) because less blood is being filtered through the kidneys. This can occur in conditions such as shock, severe dehydration, or heart failure, but it is not the primary mechanism in acute tubular necrosis (ATN).
B. The glomerular filtration rate decreases because there is injury to the renal tubular cells. In ATN, the injury to renal tubular cells impairs their function, leading to reduced reabsorption and filtration ability, which contributes to the decrease in GFR.
C. The glomerular filtration rate decreases because inflammatory cells invade the already damaged kidneys. While inflammation may be present, it is not the primary cause of decreased GFR in acute tubular necrosis; reduced blood flow and tubular cell injury are more direct causes.
D. The glomerular filtration rate decreases because there is obstruction leading to the filtration system backing up and eventually shutting the kidneys down. Obstruction is not typically a characteristic of acute tubular necrosis; ATN is usually caused by ischemic or toxic injury, not physical obstruction.